{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-28520","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-02-27T21:07:55.466Z","datePublished":"2026-03-15T13:35:42.482Z","dateUpdated":"2026-03-16T14:20:19.411Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-03-15T13:35:42.482Z"},"datePublic":"2026-03-11T00:00:00.000Z","title":"arduino-TuyaOpen WiFiMulti Single-Byte Buffer Overflow Remote Code Execution","descriptions":[{"lang":"en","value":"arduino-TuyaOpen before version 1.2.1 contains a single-byte buffer overflow vulnerability in the WiFiMulti component. When the victim's smart hardware connects to an attacker-controlled AP hotspot, the attacker can exploit the overflow to execute arbitrary code on the affected embedded device."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Off-by-one Error","cweId":"CWE-193","type":"CWE"}]}],"affected":[{"vendor":"Tuya","product":"arduino-TuyaOpen","versions":[{"version":"0","lessThan":"1.2.1","status":"affected","versionType":"semver"}]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":8.6,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS"},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":8.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"format":"CVSS"}],"references":[{"url":"https://src.tuya.com/announcement/32","name":"Tuya SRC Security Advisory","tags":["vendor-advisory"]},{"url":"https://github.com/tuya/arduino-TuyaOpen","name":"arduino-TuyaOpen GitHub Repository","tags":["product"]},{"name":"VulnCheck Advisory: arduino-TuyaOpen WiFiMulti Single-Byte Buffer Overflow Remote Code Execution","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/arduino-tuyaopen-wifimulti-single-byte-buffer-overflow-remote-code-execution"}],"x_generator":{"engine":"vulncheck"},"credits":[{"lang":"en","value":"Maxime ROSSI BELLOM","type":"finder"}]},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-28520","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-03-16T14:13:21.869186Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-16T14:20:19.411Z"}}]}}